1 17e5fb89 2004-04-21 devnull /*
  2 17e5fb89 2004-04-21 devnull  *	news foo	prints /lib/news/foo
  3 17e5fb89 2004-04-21 devnull  *	news -a		prints all news items, latest first
  4 17e5fb89 2004-04-21 devnull  *	news -n		lists names of new items
  5 17e5fb89 2004-04-21 devnull  *	news		prints items changed since last news
  6 17e5fb89 2004-04-21 devnull  */
  7 17e5fb89 2004-04-21 devnull 
  8 17e5fb89 2004-04-21 devnull #include <u.h>
  9 17e5fb89 2004-04-21 devnull #include <libc.h>
 10 17e5fb89 2004-04-21 devnull #include <bio.h>
 11 17e5fb89 2004-04-21 devnull 
 12 17e5fb89 2004-04-21 devnull #define	NINC	50	/* Multiples of directory allocation */
 13 17e5fb89 2004-04-21 devnull char	*NEWS = "#9/news";
 14 17e5fb89 2004-04-21 devnull char	TFILE[] = "%s/lib/newstime";
 15 17e5fb89 2004-04-21 devnull 
 16 17e5fb89 2004-04-21 devnull /*
 17 17e5fb89 2004-04-21 devnull  *	The following items should not be printed.
 18 17e5fb89 2004-04-21 devnull  */
 19 17e5fb89 2004-04-21 devnull char*	ignore[] =
 20 17e5fb89 2004-04-21 devnull {
 21 17e5fb89 2004-04-21 devnull 	"core",
 22 17e5fb89 2004-04-21 devnull 	"dead.letter",
 23 17e5fb89 2004-04-21 devnull 	0
 24 17e5fb89 2004-04-21 devnull };
 25 17e5fb89 2004-04-21 devnull 
 26 17e5fb89 2004-04-21 devnull typedef
 27 17e5fb89 2004-04-21 devnull struct
 28 17e5fb89 2004-04-21 devnull {
 29 17e5fb89 2004-04-21 devnull 	long	time;
 30 17e5fb89 2004-04-21 devnull 	char	*name;
 31 17e5fb89 2004-04-21 devnull 	vlong	length;
 32 17e5fb89 2004-04-21 devnull } File;
 33 17e5fb89 2004-04-21 devnull File*	n_list;
 34 17e5fb89 2004-04-21 devnull int	n_count;
 35 17e5fb89 2004-04-21 devnull int	n_items;
 36 17e5fb89 2004-04-21 devnull Biobuf	bout;
 37 17e5fb89 2004-04-21 devnull 
 38 17e5fb89 2004-04-21 devnull int	fcmp(const void *a, const void *b);
 39 17e5fb89 2004-04-21 devnull void	read_dir(int update);
 40 17e5fb89 2004-04-21 devnull void	print_item(char *f);
 41 17e5fb89 2004-04-21 devnull void	eachitem(void (*emit)(char*), int all, int update);
 42 17e5fb89 2004-04-21 devnull void	note(char *s);
 43 17e5fb89 2004-04-21 devnull 
 44 17e5fb89 2004-04-21 devnull void
 45 17e5fb89 2004-04-21 devnull main(int argc, char *argv[])
 46 17e5fb89 2004-04-21 devnull {
 47 17e5fb89 2004-04-21 devnull 	int i;
 48 17e5fb89 2004-04-21 devnull 
 49 17e5fb89 2004-04-21 devnull 	NEWS = unsharp(NEWS);
 50 17e5fb89 2004-04-21 devnull 
 51 17e5fb89 2004-04-21 devnull 	Binit(&bout, 1, OWRITE);
 52 17e5fb89 2004-04-21 devnull 	if(argc == 1) {
 53 17e5fb89 2004-04-21 devnull 		eachitem(print_item, 0, 1);
 54 17e5fb89 2004-04-21 devnull 		exits(0);
 55 17e5fb89 2004-04-21 devnull 	}
 56 17e5fb89 2004-04-21 devnull 	ARGBEGIN{
 57 17e5fb89 2004-04-21 devnull 	case 'a':	/* print all */
 58 17e5fb89 2004-04-21 devnull 		eachitem(print_item, 1, 0);
 59 17e5fb89 2004-04-21 devnull 		break;
 60 17e5fb89 2004-04-21 devnull 
 61 17e5fb89 2004-04-21 devnull 	case 'n':	/* names only */
 62 17e5fb89 2004-04-21 devnull 		eachitem(note, 0, 0);
 63 17e5fb89 2004-04-21 devnull 		if(n_items)
 64 17e5fb89 2004-04-21 devnull 			Bputc(&bout, '\n');
 65 17e5fb89 2004-04-21 devnull 		break;
 66 17e5fb89 2004-04-21 devnull 
 67 17e5fb89 2004-04-21 devnull 	default:
 68 17e5fb89 2004-04-21 devnull 		fprint(2, "news: bad option %c\n", ARGC());
 69 17e5fb89 2004-04-21 devnull 		exits("usage");
 70 17e5fb89 2004-04-21 devnull 	}ARGEND
 71 17e5fb89 2004-04-21 devnull 	for(i=0; i<argc; i++)
 72 17e5fb89 2004-04-21 devnull 		print_item(argv[i]);
 73 17e5fb89 2004-04-21 devnull 	exits(0);
 74 17e5fb89 2004-04-21 devnull }
 75 17e5fb89 2004-04-21 devnull 
 76 17e5fb89 2004-04-21 devnull int
 77 17e5fb89 2004-04-21 devnull fcmp(const void *a, const void *b)
 78 17e5fb89 2004-04-21 devnull {
 79 17e5fb89 2004-04-21 devnull 	long x;
 80 17e5fb89 2004-04-21 devnull 
 81 17e5fb89 2004-04-21 devnull 	x = ((File*)b)->time - ((File*)a)->time;
 82 17e5fb89 2004-04-21 devnull 	if(x < 0)
 83 17e5fb89 2004-04-21 devnull 		return -1;
 84 17e5fb89 2004-04-21 devnull 	if(x > 0)
 85 17e5fb89 2004-04-21 devnull 		return 1;
 86 17e5fb89 2004-04-21 devnull 	return 0;
 87 17e5fb89 2004-04-21 devnull }
 88 17e5fb89 2004-04-21 devnull 
 89 17e5fb89 2004-04-21 devnull /*
 90 17e5fb89 2004-04-21 devnull  *	read_dir: get the file names and modification dates for the
 91 17e5fb89 2004-04-21 devnull  *	files in /usr/news into n_list; sort them in reverse by
 92 17e5fb89 2004-04-21 devnull  *	modification date.
 93 17e5fb89 2004-04-21 devnull  */
 94 17e5fb89 2004-04-21 devnull void
 95 17e5fb89 2004-04-21 devnull read_dir(int update)
 96 17e5fb89 2004-04-21 devnull {
 97 17e5fb89 2004-04-21 devnull 	Dir *d;
 98 17e5fb89 2004-04-21 devnull 	char newstime[100], *home;
 99 17e5fb89 2004-04-21 devnull 	int i, j, n, na, fd;
100 17e5fb89 2004-04-21 devnull 
101 17e5fb89 2004-04-21 devnull 	n_count = 0;
102 17e5fb89 2004-04-21 devnull 	n_list = malloc(NINC*sizeof(File));
103 17e5fb89 2004-04-21 devnull 	na = NINC;
104 c8b6342d 2005-01-13 devnull 	home = getenv("HOME");
105 17e5fb89 2004-04-21 devnull 	if(home) {
106 17e5fb89 2004-04-21 devnull 		sprint(newstime, TFILE, home);
107 17e5fb89 2004-04-21 devnull 		d = dirstat(newstime);
108 17e5fb89 2004-04-21 devnull 		if(d != nil) {
109 17e5fb89 2004-04-21 devnull 			n_list[n_count].name = strdup("");
110 17e5fb89 2004-04-21 devnull 			n_list[n_count].time =d->mtime-1;
111 17e5fb89 2004-04-21 devnull 			n_list[n_count].length = 0;
112 17e5fb89 2004-04-21 devnull 			n_count++;
113 17e5fb89 2004-04-21 devnull 			free(d);
114 17e5fb89 2004-04-21 devnull 		}
115 17e5fb89 2004-04-21 devnull 		if(update) {
116 17e5fb89 2004-04-21 devnull 			fd = create(newstime, OWRITE, 0644);
117 17e5fb89 2004-04-21 devnull 			if(fd >= 0)
118 17e5fb89 2004-04-21 devnull 				close(fd);
119 17e5fb89 2004-04-21 devnull 		}
120 17e5fb89 2004-04-21 devnull 	}
121 17e5fb89 2004-04-21 devnull 	fd = open(NEWS, OREAD);
122 17e5fb89 2004-04-21 devnull 	if(fd < 0) {
123 17e5fb89 2004-04-21 devnull 		fprint(2, "news: ");
124 17e5fb89 2004-04-21 devnull 		perror(NEWS);
125 17e5fb89 2004-04-21 devnull 		exits(NEWS);
126 17e5fb89 2004-04-21 devnull 	}
127 17e5fb89 2004-04-21 devnull 
128 17e5fb89 2004-04-21 devnull 	n = dirreadall(fd, &d);
129 17e5fb89 2004-04-21 devnull 	for(i=0; i<n; i++) {
130 17e5fb89 2004-04-21 devnull 		for(j=0; ignore[j]; j++)
131 17e5fb89 2004-04-21 devnull 			if(strcmp(ignore[j], d[i].name) == 0)
132 17e5fb89 2004-04-21 devnull 				goto ign;
133 17e5fb89 2004-04-21 devnull 		if(na <= n_count) {
134 17e5fb89 2004-04-21 devnull 			na += NINC;
135 17e5fb89 2004-04-21 devnull 			n_list = realloc(n_list, na*sizeof(File));
136 17e5fb89 2004-04-21 devnull 		}
137 17e5fb89 2004-04-21 devnull 		n_list[n_count].name = strdup(d[i].name);
138 17e5fb89 2004-04-21 devnull 		n_list[n_count].time = d[i].mtime;
139 17e5fb89 2004-04-21 devnull 		n_list[n_count].length = d[i].length;
140 17e5fb89 2004-04-21 devnull 		n_count++;
141 17e5fb89 2004-04-21 devnull 	ign:;
142 17e5fb89 2004-04-21 devnull 	}
143 17e5fb89 2004-04-21 devnull 	free(d);
144 17e5fb89 2004-04-21 devnull 
145 17e5fb89 2004-04-21 devnull 	close(fd);
146 17e5fb89 2004-04-21 devnull 	qsort(n_list, n_count, sizeof(File), fcmp);
147 17e5fb89 2004-04-21 devnull }
148 17e5fb89 2004-04-21 devnull 
149 17e5fb89 2004-04-21 devnull void
150 17e5fb89 2004-04-21 devnull print_item(char *file)
151 17e5fb89 2004-04-21 devnull {
152 17e5fb89 2004-04-21 devnull 	char name[4096], *p, *ep;
153 17e5fb89 2004-04-21 devnull 	Dir *dbuf;
154 17e5fb89 2004-04-21 devnull 	int f, c;
155 17e5fb89 2004-04-21 devnull 	int bol, bop;
156 17e5fb89 2004-04-21 devnull 
157 17e5fb89 2004-04-21 devnull 	sprint(name, "%s/%s", NEWS, file);
158 17e5fb89 2004-04-21 devnull 	f = open(name, OREAD);
159 17e5fb89 2004-04-21 devnull 	if(f < 0) {
160 17e5fb89 2004-04-21 devnull 		fprint(2, "news: ");
161 17e5fb89 2004-04-21 devnull 		perror(name);
162 17e5fb89 2004-04-21 devnull 		return;
163 17e5fb89 2004-04-21 devnull 	}
164 17e5fb89 2004-04-21 devnull 	strcpy(name, "...");
165 17e5fb89 2004-04-21 devnull 	dbuf = dirfstat(f);
166 17e5fb89 2004-04-21 devnull 	if(dbuf == nil)
167 17e5fb89 2004-04-21 devnull 		return;
168 17e5fb89 2004-04-21 devnull 	Bprint(&bout, "\n%s (%s) %s\n", file,
169 17e5fb89 2004-04-21 devnull 		dbuf->muid[0]? dbuf->muid : dbuf->uid,
170 17e5fb89 2004-04-21 devnull 		asctime(localtime(dbuf->mtime)));
171 17e5fb89 2004-04-21 devnull 	free(dbuf);
172 17e5fb89 2004-04-21 devnull 
173 17e5fb89 2004-04-21 devnull 	bol = 1;	/* beginning of line ...\n */
174 17e5fb89 2004-04-21 devnull 	bop = 1;	/* beginning of page ...\n\n */
175 17e5fb89 2004-04-21 devnull 	for(;;) {
176 17e5fb89 2004-04-21 devnull 		c = read(f, name, sizeof(name));
177 17e5fb89 2004-04-21 devnull 		if(c <= 0)
178 17e5fb89 2004-04-21 devnull 			break;
179 17e5fb89 2004-04-21 devnull 		p = name;
180 17e5fb89 2004-04-21 devnull 		ep = p+c;
181 17e5fb89 2004-04-21 devnull 		while(p < ep) {
182 17e5fb89 2004-04-21 devnull 			c = *p++;
183 17e5fb89 2004-04-21 devnull 			if(c == '\n') {
184 17e5fb89 2004-04-21 devnull 				if(!bop) {
185 17e5fb89 2004-04-21 devnull 					Bputc(&bout, c);
186 17e5fb89 2004-04-21 devnull 					if(bol)
187 17e5fb89 2004-04-21 devnull 						bop = 1;
188 17e5fb89 2004-04-21 devnull 					bol = 1;
189 17e5fb89 2004-04-21 devnull 				}
190 17e5fb89 2004-04-21 devnull 				continue;
191 17e5fb89 2004-04-21 devnull 			}
192 17e5fb89 2004-04-21 devnull 			if(bol) {
193 17e5fb89 2004-04-21 devnull 				Bputc(&bout, '\t');
194 17e5fb89 2004-04-21 devnull 				bol = 0;
195 17e5fb89 2004-04-21 devnull 				bop = 0;
196 17e5fb89 2004-04-21 devnull 			}
197 17e5fb89 2004-04-21 devnull 			Bputc(&bout, c);
198 17e5fb89 2004-04-21 devnull 		}
199 17e5fb89 2004-04-21 devnull 	}
200 17e5fb89 2004-04-21 devnull 	if(!bol)
201 17e5fb89 2004-04-21 devnull 		Bputc(&bout, '\n');
202 17e5fb89 2004-04-21 devnull 	close(f);
203 17e5fb89 2004-04-21 devnull }
204 17e5fb89 2004-04-21 devnull 
205 17e5fb89 2004-04-21 devnull void
206 17e5fb89 2004-04-21 devnull eachitem(void (*emit)(char*), int all, int update)
207 17e5fb89 2004-04-21 devnull {
208 17e5fb89 2004-04-21 devnull 	int i;
209 17e5fb89 2004-04-21 devnull 
210 17e5fb89 2004-04-21 devnull 	read_dir(update);
211 17e5fb89 2004-04-21 devnull 	for(i=0; i<n_count; i++) {
212 17e5fb89 2004-04-21 devnull 		if(n_list[i].name[0] == 0) {	/* newstime */
213 17e5fb89 2004-04-21 devnull 			if(all)
214 17e5fb89 2004-04-21 devnull 				continue;
215 17e5fb89 2004-04-21 devnull 			break;
216 17e5fb89 2004-04-21 devnull 		}
217 17e5fb89 2004-04-21 devnull 		if(n_list[i].length == 0)		/* in progress */
218 17e5fb89 2004-04-21 devnull 			continue;
219 17e5fb89 2004-04-21 devnull 		(*emit)(n_list[i].name);
220 17e5fb89 2004-04-21 devnull 	}
221 17e5fb89 2004-04-21 devnull }
222 17e5fb89 2004-04-21 devnull 
223 17e5fb89 2004-04-21 devnull void
224 17e5fb89 2004-04-21 devnull note(char *file)
225 17e5fb89 2004-04-21 devnull {
226 17e5fb89 2004-04-21 devnull 
227 17e5fb89 2004-04-21 devnull 	if(!n_items)
228 17e5fb89 2004-04-21 devnull 		Bprint(&bout, "news:");
229 17e5fb89 2004-04-21 devnull 	Bprint(&bout, " %s", file);
230 17e5fb89 2004-04-21 devnull 	n_items++;
231 17e5fb89 2004-04-21 devnull }